PROBLEM TO BE SOLVED: To provide a biological signal measurement device that can prevent degradation of an S/N ratio of a signal to be detected.SOLUTION: The biological signal measurement device includes: a light source 101 first light receiving means that receives light irradiated from the light source and reflected on a body surface of a user reflection means that is disposed at a position closer to the light source than to the body surface of the user and reflects the light irradiated from the light source second light receiving means that receives the light reflected by the reflection means and calculation means that acquires, from each of the first light receiving means and the second light receiving means, a first signal obtained by the first light receiving means by receiving the light reflected on the body surface of the user and a second signal obtained by the second light receiving means by receiving the light reflected by the reflection means, and that performs a subtraction process of subtracting a value of the second signal from a value of the first signal in order to remove noise included in the light irradiated from the light source.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】検出される信号のS/N比の劣化を防ぎ得る生体信号計測装置を提供する。【解決手段】生体信号計測装置は、光源101と、光源から照射された光のうち、ユーザの体表面で反射された光を受光する第1の受光手段と、ユーザの体表面よりも光源に近い位置に設けられ、光源から照射された光を反射する反射手段と、反射手段によって反射された光を受光する第2の受光手段と、第1の受光手段がユーザの体表面で反射された光を受光することによって得た第1の信号と、第2の受光手段が反射手段で反射された光を受光することによって得た第2の信号とを各受光手段から取得し、光源から照射される光に含まれるノイズを除去するために、第1の信号の値から第2の信号の値を減算する減算処理を実行する演算手段とを含む。【選択図】図3
